Improvement in elevators



HQ]. REEDY.

Elevators.

Patented May 5 UNITED STATES PATENT OFFICE.

' HENRY J. REEDY, OF CINCINNATI, OHIO.

IMPROVEMENT IN ELEVATORS.

Specification forming part of Letters Patent No. 150,612, dated May 5,1874 application filed April 2, 1874.

To all whom it may concern:

Be it known that I, HENRY J. REEDY, of Cincinnati, Hamilton county,State of Ohio, have invented a certain new and useful Improvement inHoisting-Machines, of which the following is a specification:

My invention consists in the connection,with the platform and rope-drumof a hoistingmachine, of a screw device for giving a lateral movement tothe drum-shaft, by which the rope ropeF, and GrlS the drum of thebalance-weight rope H. The balance-weight D slides in the usual ways I.The driving-shaft is operated by the rope L on the sheave-wheel K, inthe usual way, and is connected to the hoistingshaft by pinion M andspur-wheel N, in the manner shown. The driving-shaft A is journaled sothat it has no end play, while in the hoisting-shaft B end play isprovided for, so. that it is necessary to have a pinion, M, of a greaterwidth of face than the spur-wheel N, the difference being about equal tothe required lateral play or movement of the shaft B. One end of theshaft B'has a screw-thread, P, out upon it, and the journal-box of thisend of the shaft has a female screw-thread out within it to fit thescrew P, so that, in the revolution of this shaft, it must also movelaterally to the extent of the pitch of the screw for each revolution,and the pitch of the screw is equal to the diameter of the ropes F or H.By the operation of this device, as one rope is winding and the otherunwinding, the lateral play of the shaft so moves the drums as that theropes are prevented from winding or unwinding irregularly, and areprevented from becoming entangled, a clear space the thickness of therope being always in line with the rope for it to wind upon.

It is obvious that differences in construction may be made without anydeparture from the principles of my inventionas,for example, in place ofthe journal-bearing having a female screw to fit the screw P, thebearing may be smooth and a set'screw or projection used to engage thethread of the screw P.

I claim 1. In combination with. the platform 0, hoisting-rope F, anddrum E, the screw P, operating to give lateral movement to thedrum-shaft '13, substantially in the manner and for the purposespecified.

2. The combination of platform 0, rope F, drum E, shaft B,.drum G, ropeH, balanceweight D, and laterally-adjusting screw P, substantially asand for the purpose specified.

In testimony of which invention I hereunto set my hand.

HENRY J. REEDY.

Witnesses:

P. M. HUNTER, J. L. WARTMANN.

